<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @version    $Id: Json.php 16222 2009-06-21 19:55:20Z thomas $
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_Json */
require_once 'Zend/Json.php';

/** Zend_Controller_Front */
require_once 'Zend/Controller/Front.php';

/** Zend_View_Helper_Abstract.php */
require_once 'Zend/View/Helper/Abstract.php';

/**
 * Helper for simplifying JSON responses
 *
 * @package    Zend_View
 * @subpackage Helper
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_View_Helper_Json extends Zend_View_Helper_Abstract
{
	/**
	 * Encode data as JSON, disable layouts, and set response header
	 *
	 * If $keepLayouts is true, does not disable layouts.
	 *
	 * @param  mixed $data
	 * @param  bool $keepLayouts
	 * NOTE:   if boolean, establish $keepLayouts to true|false
	 *         if array, admit params for Zend_Json::encode as enableJsonExprFinder=>true|false
	 *         this array can contains a 'keepLayout'=>true|false
	 *         that will not be passed to Zend_Json::encode method but will be used here
	 * @return string|void
	 */
	public function json($data, $keepLayouts = false)
	{
		$options = array();
		if (is_array($keepLayouts))
		{
			$options     = $keepLayouts;
			$keepLayouts = (array_key_exists('keepLayouts', $keepLayouts))
			? $keepLayouts['keepLayouts']
			: false;
			unset($options['keepLayouts']);
		}

		$data = Zend_Json::encode($data, null, $options);
		if (!$keepLayouts) {
			require_once 'Zend/Layout.php';
			$layout = Zend_Layout::getMvcInstance();
			if ($layout instanceof Zend_Layout) {
				$layout->disableLayout();
			}
		}

		$response = Zend_Controller_Front::getInstance()->getResponse();
		$response->setHeader('Content-Type', 'application/json');
		return $data;
	}
}
